diff --git a/graphene_django/converter.py b/graphene_django/converter.py
index 6d4da8e..ea14ac1 100644
--- a/graphene_django/converter.py
+++ b/graphene_django/converter.py
@@ -167,15 +167,13 @@ def convert_date_to_string(field, registry=None):
 @convert_django_field.register(RelationshipDefinition)
 def convert_onetoone_field_to_djangomodel(field, registry=None):
     model = field._raw_class
-
+    print('field' , field)
+    print('model in convert', model)
     def dynamic_type():
         _type = registry.get_type_for_model(model)
+        print(_type)
         if not _type:
             return
-
-        # We do this for a bug in Django 1.8, where null attr
-        # is not available in the OneToOneRel instance
-
         required = define_null_parameter(manager)
         return Field(_type, required=required)
 
diff --git a/graphene_django/registry.py b/graphene_django/registry.py
index 50a8ae5..c2f3dcd 100644
--- a/graphene_django/registry.py
+++ b/graphene_django/registry.py
@@ -19,6 +19,7 @@ class Registry(object):
             self._registry[cls._meta.model] = cls
 
     def get_type_for_model(self, model):
+        print('Registry', self._registry)
         return self._registry.get(model)
 
     def register_converted_field(self, field, converted):